---
id: CVE-2026-98117
title: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cachefiles: Fix potential UAF/KASAN warning

  Currently, trace_cachefiles_coherency() is being passed a pointer to a
  __be64 lain over the coherency data in struct cachef…
summary: |-
  In the Linux kernel, the following vulnerability has been resolved:

  cachefiles: Fix potential UAF/KASAN warning

  Currently, trace_cachefiles_coherency() is being passed a pointer to a
  __be64 lain over the coherency data in struct cachef…
severity: none
vendor: Linux
product: Linux
affected:
  - >-
    Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 <
    68d459e6e609c31f96a203dd6eec60c634f155e1
  - >-
    Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 <
    93488ea378b4427598cace558236c110515d743b
  - >-
    Linux >= 229105e5cfd9832a9ef1368c96e0098ec3a5fbf0 <
    a67632c8c2688d6e0091529bcefe54bc5ee80e9b
  - Linux 6.14
published: '2026-09-25'
updated: '2026-09-25'
sourceUpdated: '2026-09-25T11:17:42.920'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-98117'
references:
  - url: 'https://git.kernel.org/stable/c/68d459e6e609c31f96a203dd6eec60c634f155e1'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/93488ea378b4427598cace558236c110515d743b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
  - url: 'https://git.kernel.org/stable/c/a67632c8c2688d6e0091529bcefe54bc5ee80e9b'
    label: 416baaa9-dc9f-4396-8d5f-8c081fb06d67
tags:
  - nvd
  - cve.org
ingestedAt: '2026-09-25T11:06:38.821Z'
---

## Overview

In the Linux kernel, the following vulnerability has been resolved:

cachefiles: Fix potential UAF/KASAN warning

Currently, trace_cachefiles_coherency() is being passed a pointer to a
__be64 lain over the coherency data in struct cachefiles_xattr so that it
can display the first 8 bytes.  However, the data is of variable length and
could even be 0 bytes.  This could lead to a UAF or KASAN warning.

Fix this by making sure the buffer has room for at least 8 bytes and that
those 8 bytes are pre-cleared.

Further, those bytes are not 8-byte aligned, so fix the tracepoint to
extract the data as four 2-byte words (they are 2-byte aligned) and
reassemble the __be64.  The compiler will convert this into a single 8-byte
load where the CPU supports it.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.